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Glam Journal

Are Autolite Iridium XP plugs pre-gapped?

Author

William Burgess

Updated on March 11, 2026

Are Autolite Iridium XP plugs pre-gapped?

Do Autolite® spark plugs come pre-gapped from the factory? Autolite® and all spark plug manufacturers offer spark plugs pre-gapped in the most popular gap sizes. Because of the many gap sizes required, no one offers spark plugs properly gapped for every application. Gapping has always been the job of the installer.

How long do Autolite iridium plugs last?

Autolite Iridium XP bring the features of OEM iridium long life plugs to the market, with an iridium enhanced fine wire center electrode and platinum tipped ground electrode. Under normal operating conditions, expect a good 100k miles out of these plugs.

Do iridium spark plugs increase horsepower?

Iridium spark plugs allow for better combustion, lower emissions, improved fuel economy, and more horsepower. Increase fuel efficiency. If your engine is powered by worn-out spark plugs, it will not run as efficiently as intended.

Which plug is better platinum or iridium?

Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs.

Do Autolite Iridium plugs need to be gapped?

Autolite spark plugs traditionally leave the factory pre-gapped for their most popular application. However, a plug may fit hundreds of engines, from cars to golf carts. Gapping the plugs to your engine’s specifications is important to prevent pre-ignition, detonation, fouling and poor fuel economy.

How long do Autolite platinum plugs last?

Installing a single platinum plug in place of a copper core spark plug will result in a 50-60,000 mile service life, a nice upgrade for your customer.

How often should you change laser iridium spark plugs?

Conventional spark plugs need to be replaced every 30,000-50,000 miles. Long-life (iridium- or platinum-tipped) spark plugs need to be changed between 60,000 and 150,000 miles, depending on the vehicle.

How do I know if iridium plugs are worn?

Signs that the best iridium spark plugs need replacement

  1. The replacement interval is here.
  2. Degradation of fuel economy.
  3. Taking too long to accelerate.
  4. Rough idling in the engine.
  5. Misfiring in the engine.
  6. Difficulty in starting the car.

Do Iridium plugs need to be gapped?

In most cases your Iridium Power plugs do not need to be gapped. Should you decide to re-gap your Iridium Power plug, use extreme caution as improper gapping may damage or destroy the Iridium center electrode or porcelain center.

Are Iridium plugs worth it?

Iridium spark plugs are better at starting engines than other types of spark plug because the spark is highly concentrated in the central electrode, and consequentially requires less voltage to operate. This makes ignitions faster and more reliable, and also reduces power consumption.

Are iridium plugs worth it?

What is the difference between iridium and Laser Iridium?

These two plugs perform similarly, due to their fine-wire tip design, but the service interval is different; the Laser Series are typically designed to last 80 to 100 thousand miles, where as the Iridium IX® spark plugs are designed to last 40 to 50 thousand miles.